Which of the following statements are correct?

           (A) The electronic configuration of Cr is [Ar] 3d⁵4s¹.

           (B) The magnetic quantum number may a negative value.

           (C) In the ground state of an atom, the orbitals are filled in order of their increasing energies.

           (D) The total number of nodes are given by (n-2)

           Choose the most appropriate answer from the options given below:

<p> (A) Cr = [Ar]3d⁵4s¹</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (B) m = &lt;!- [if gte mso 9]>&lt;xml&gt; <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1025" DrawAspect="Content" ObjectID="_1814280729"> </o:OLEObject>&lt;/xml&gt;&lt;! [endif]-&gt;&nbsp;<span contenteditable="false"> <math> <mrow> <mo>−</mo> <mi mathvariant="script">l</mi> <mtext> </mtext> <mtext> </mtext> <mi>t</mi> <mi>o</mi> <mo>+</mo> <mi mathvariant="script">l</mi> </mrow> </math> </span></p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (C) According to Aufbau principle, orbital are filled in order of their increasing energies.</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (D) Total nodes = n – 1</p>

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